CN102968516A - Method for analyzing fatigue strength of brake control device on basis of finite element - Google Patents
Method for analyzing fatigue strength of brake control device on basis of finite element Download PDFInfo
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- CN102968516A CN102968516A CN2012101221905A CN201210122190A CN102968516A CN 102968516 A CN102968516 A CN 102968516A CN 2012101221905 A CN2012101221905 A CN 2012101221905A CN 201210122190 A CN201210122190 A CN 201210122190A CN 102968516 A CN102968516 A CN 102968516A
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Abstract
The invention relates to a method for analyzing a fatigue strength of a brake control device on the basis of a finite element. The method comprises the following steps of: extracting a middle plane of an air cylinder hanger, setting a thickness and then carrying out finite element meshing on each part of the brake control device; carrying out welding binding constraint on the air cylinder hanger and an air cylinder; applying masses to mass centers of the air cylinder and a gas circuit board and carrying out mass center coupling; modeling, setting boundary conditions, applying a load and carrying out vibration shock simulating calculation; and carrying out fatigue calculation and converting recycling times into a service life. The invention not only considers a welding method and a processing mode of the brake control device, but also considers the direction and the order of magnitude, of the applied vibration shock, and is based on a vibration shock outline standard; on one hand, the service life of the brake control device can be precast according to a simulation result, so that the structure of the brake control device is optimally designed; and on the other hand, a variation model of performance parameters can be established on the basis of the simulation result, and the design period and the design cost of the brake control device can be reduced.
Description
Technical field
The present invention relates to a kind of brake control device of rail transit vehicle Fatigue Strength Analysis method, particularly a kind of EMU brake control Fatigue Strength Analysis method belongs to the high speed motor car technical group field.
Background technology
At present, the maximum operational speed of the CRH2 EMUs of domestic operation has surpassed 300km/h.And brake control is as the motor vehicle brake system key components, to device fatigue strength safety and reliability very high requirement is arranged.Whether domestic verification method to brake control fatigue strength generally adopts the experience structure design, carry out impact shock after the device machine-shaping and test demo plant fatigue strength to meet the demands.The shortcoming of its existence is: the device design cycle increases, in case do not meet the demands through the Trial Verification Installation structure, re-start design, has increased the design cycle; Whether the device design cost increases, whenever design a kind of apparatus structure and all will meet the demands by verifying fatigue strength, and test number (TN) is many, and testing expenses increase.
Summary of the invention
Technical matters to be solved by this invention is, overcome the above-mentioned deficiency of prior art, a kind of fast and effectively a kind of brake control Fatigue Strength Analysis method based on finite element is provided, make its design cycle shorter, design cost is lower, and fatigue life prediction is more accurate.
In order to solve above technical matters, a kind of brake control Fatigue Strength Analysis method based on finite element provided by the invention comprises the steps:
The middle face of the first step, extraction air cylinder hanging bracket, and thickness is set, then reservoir, air cylinder hanging bracket, reservoir end cap, gas path plate are carried out finite element grid and divide.
By the software that possesses the grid partition functionality reservoir, air cylinder hanging bracket, reservoir end cap, gas path plate being carried out finite element grid in the described first step divides.The described software that possesses the grid partition functionality is a kind of among ICEM-CFD, Hypermesh, the Patran.
Second step, air cylinder hanging bracket and reservoir are welded binding constraints.
Because suspension bracket itself belongs to weldment in the brake control, and between suspension bracket and the reservoir for being welded to connect, so need to weld binding constraints to suspension bracket and reservoir.
The 3rd step, to the barycenter place of reservoir and gas path plate giving quality, and carry out the barycenter coupling.
This step is the simplified model object greatly, can reduce data volume, is conducive to improve the speed of simulation calculation.
The 4th goes on foot, builds the brake control finite element analysis model, apply boundary condition to installing each parts fixed connection place, according to rail vehicle vibration impact experiment outline imposed load, carry out the vibratory impulse simulation calculation, obtain to record under each parts specific loading of brake control or the data file A of elastic stress under the real work load.
The 5th step, use analysis of fatigue software read the data file A that obtains in the 4th step, according to real load operating mode and alternate load form with the success ratio superposition to produce the working stress time history, carry out fatigue and calculate, obtain each parts at the number of times capable of circulation of specifying under the operating mode.
The 6th step, specifying the number of times capable of circulation under the operating mode to be converted to the life-span time limit of specifying under the operating mode each parts.
Among the present invention, described second step, the 3rd step, the 4th step realize by finite element software.
Described finite element software is a kind of among Abaqus, Hypermesh, the Nsoft.
In described the 6th step, specifying the number of times capable of circulation under the operating mode to be converted to the life-span time limit of specifying under the operating mode each parts by finite element software.
According to simulation result brake control system is reasonably estimated, if fatigue strength is unreasonable as a result, also need to carry out suitable optimization, know that simulation result satisfies till the actual needs.
Beneficial effect of the present invention is as follows: Fatigue Strength Analysis method of the present invention, welding method and the processing mode of brake control had both been considered, direction and magnitude that vibratory impulse applies have been considered again, take vibratory impulse outline standard as foundation, can predict according to simulation result on the one hand the time limit in serviceable life of brake control, its structure is optimized design; The variation model of performance parameter can be set up based on simulation result on the other hand, design cycle and the design cost of brake control can be reduced.
Embodiment
The present invention is further illustrated below in conjunction with embodiment.
The present invention is based on the brake control Fatigue Strength Analysis method of finite element, comprise the steps:
The middle face of the first step, extraction air cylinder hanging bracket, and thickness is set, then reservoir, air cylinder hanging bracket, reservoir end cap, gas path plate are carried out finite element grid and divide.
In order to make the time shorten of brake control Fatigue Strength Analysis, need face in the extraction of brake control suspension bracket, and thickness will be set;
Brake control being carried out grid when dividing, in order to guarantee carrying out smoothly and computational accuracy of brake control Fatigue Strength Analysis, must guarantee that the shared ratio in the mesh triangles shape unit divided is less than 0.1%.Because the model of brake control is larger, design condition is many, so vibration method of superposition, both frequency abstraction and instantaneous modal dynamic analytic approach are adopted in the calculating of brake control.
By the software that possesses the grid partition functionality reservoir, air cylinder hanging bracket, reservoir end cap, gas path plate being carried out finite element grid in this step divides.The described software that possesses the grid partition functionality is a kind of among ICEM-CFD, Hypermesh, the Patran.
Second step, air cylinder hanging bracket and reservoir are welded binding constraints;
Because suspension bracket itself belongs to weldment in the brake control, and between suspension bracket and the reservoir for being welded to connect, so need to weld binding constraints to suspension bracket and reservoir.Welded seam area must evenly distribute, and welding node is equidistantly arranged.
The 3rd step, to the barycenter place of reservoir and gas path plate giving quality, and carry out the barycenter coupling.This step is the simplified model object greatly, can reduce data volume, is conducive to improve the speed of simulation calculation.
The 4th goes on foot, builds the brake control finite element analysis model, apply boundary condition to installing each parts fixed connection place, according to rail vehicle vibration impact experiment outline imposed load, carry out the vibratory impulse simulation calculation, obtain to record under each parts specific loading of brake control or the data file A of elastic stress under the real work load;
The 5th step, use analysis of fatigue software read the data file A that obtains in the 4th step, according to real load operating mode and alternate load form with the success ratio superposition to produce the working stress time history, carry out fatigue and calculate, obtain each parts at the number of times capable of circulation of specifying under the operating mode;
The 6th step, specifying the number of times capable of circulation under the operating mode to be converted to the life-span time limit of specifying under the operating mode each parts.
Among the present invention, described second step, the 3rd step, the 4th step realize by finite element software.Described finite element software is a kind of among Abaqus, Hypermesh, the Nsoft.In described the 6th step, specifying the number of times capable of circulation under the operating mode to be converted to the life-span time limit of specifying under the operating mode each parts by finite element software.
The method applying vibration method of superposition computing technique is carried out analysis of Fatigue-life to brake control, obtain intensity and the fatigue lifetime of brake control, and then to reasonably estimating in structural strength and the serviceable life of brake control, and be optimized accordingly and improve.Facts have proved that the method is very fast with effective for the analysis of brake control fatigue strength.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (6)
1. the brake control Fatigue Strength Analysis method based on finite element comprises the steps:
The middle face of the first step, extraction air cylinder hanging bracket, and thickness is set, then reservoir, air cylinder hanging bracket, reservoir end cap, gas path plate are carried out finite element grid and divide;
Second step, air cylinder hanging bracket and reservoir are welded binding constraints;
The 3rd step, to the barycenter place of reservoir and gas path plate giving quality, and carry out the barycenter coupling;
The 4th goes on foot, builds the brake control finite element analysis model, apply boundary condition to installing each parts fixed connection place, according to rail vehicle vibration impact experiment outline imposed load, carry out the vibratory impulse simulation calculation, obtain to record under each parts specific loading of brake control or the data file A of elastic stress under the real work load;
The 5th step, use analysis of fatigue software read the data file A that obtains in the 4th step, according to real load operating mode and alternate load form with the success ratio superposition to produce the working stress time history, carry out fatigue and calculate, obtain each parts at the number of times capable of circulation of specifying under the operating mode;
The 6th step, specifying the number of times capable of circulation under the operating mode to be converted to the life-span time limit of specifying under the operating mode each parts.
2. the brake control Fatigue Strength Analysis method based on finite element according to claim 1 is characterized in that: by the software that possesses the grid partition functionality reservoir, air cylinder hanging bracket, reservoir end cap, gas path plate are carried out finite element grid in the described first step and divide.
3. the brake control Fatigue Strength Analysis method based on finite element according to claim 2 is characterized in that: the described software that possesses the grid partition functionality is a kind of among ICEM-CFD, Hypermesh, the Patran.
4. the brake control Fatigue Strength Analysis method based on finite element according to claim 2 is characterized in that: described second step, the 3rd step, the 4th step realize by finite element software.
5. the brake control Fatigue Strength Analysis method based on finite element according to claim 4 is characterized in that: described finite element software is a kind of among Abaqus, Hypermesh, the Nsoft.
6. the EP control valve device for the metro braking system according to claim 4 is characterized in that: in described the 6th step, specifying the number of times capable of circulation under the operating mode to be converted to the life-span time limit of specifying under the operating mode each parts by finite element software.
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Cited By (9)
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| CN106339541A (en) * | 2016-08-26 | 2017-01-18 | 中车株洲电力机车研究所有限公司 | Method for analyzing fatigue strength of welding seam of tower drum door frame in large-scale wind generating set |
| CN106980711A (en) * | 2017-03-06 | 2017-07-25 | 中国电子产品可靠性与环境试验研究所 | The air-tightness analysis method of level Hermetic Package glass insulator based on finite element simulation |
| CN107609279A (en) * | 2017-09-18 | 2018-01-19 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of T-shaped welding point impact strength design criteria acquisition methods |
| CN109342077A (en) * | 2018-09-27 | 2019-02-15 | 北京新能源汽车股份有限公司 | A kind of preparation method, the apparatus and system of vehicle body testing fatigue result |
| CN109697311A (en) * | 2018-12-10 | 2019-04-30 | 山东国金汽车制造有限公司 | A kind of automobile side-door opening and closing endurance analysis method based on finite element |
| CN109781557A (en) * | 2019-03-06 | 2019-05-21 | 中车青岛四方机车车辆股份有限公司 | The weld fatigue test method of train body weld assembly |
| CN110298125A (en) * | 2019-07-03 | 2019-10-01 | 中汽研（天津）汽车工程研究院有限公司 | A kind of fatigue analysis method based on virtual test field technology |
| CN111795813A (en) * | 2020-05-22 | 2020-10-20 | 上海汽车制动系统有限公司 | Fatigue endurance test method for disc brake |
| CN111898307A (en) * | 2020-08-20 | 2020-11-06 | 哈尔滨工业大学 | Grading simplification method of fatigue simulation model of welding spot containing multi-strand wire |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106339541A (en) * | 2016-08-26 | 2017-01-18 | 中车株洲电力机车研究所有限公司 | Method for analyzing fatigue strength of welding seam of tower drum door frame in large-scale wind generating set |
| CN106980711B (en) * | 2017-03-06 | 2021-02-23 | 中国电子产品可靠性与环境试验研究所 | Finite element simulation-based airtight packaging glass insulator airtightness analysis method |
| CN106980711A (en) * | 2017-03-06 | 2017-07-25 | 中国电子产品可靠性与环境试验研究所 | The air-tightness analysis method of level Hermetic Package glass insulator based on finite element simulation |
| CN107609279A (en) * | 2017-09-18 | 2018-01-19 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of T-shaped welding point impact strength design criteria acquisition methods |
| CN107609279B (en) * | 2017-09-18 | 2021-04-27 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Method for obtaining impact strength design criterion of T-shaped welding joint |
| CN109342077A (en) * | 2018-09-27 | 2019-02-15 | 北京新能源汽车股份有限公司 | A kind of preparation method, the apparatus and system of vehicle body testing fatigue result |
| CN109697311A (en) * | 2018-12-10 | 2019-04-30 | 山东国金汽车制造有限公司 | A kind of automobile side-door opening and closing endurance analysis method based on finite element |
| CN109781557A (en) * | 2019-03-06 | 2019-05-21 | 中车青岛四方机车车辆股份有限公司 | The weld fatigue test method of train body weld assembly |
| CN109781557B (en) * | 2019-03-06 | 2021-08-13 | 中车青岛四方机车车辆股份有限公司 | Weld fatigue testing method for train body welding assembly |
| CN110298125A (en) * | 2019-07-03 | 2019-10-01 | 中汽研（天津）汽车工程研究院有限公司 | A kind of fatigue analysis method based on virtual test field technology |
| CN111795813A (en) * | 2020-05-22 | 2020-10-20 | 上海汽车制动系统有限公司 | Fatigue endurance test method for disc brake |
| CN111795813B (en) * | 2020-05-22 | 2022-04-05 | 上海汽车制动系统有限公司 | Fatigue endurance test method for disc brake |
| CN111898307A (en) * | 2020-08-20 | 2020-11-06 | 哈尔滨工业大学 | Grading simplification method of fatigue simulation model of welding spot containing multi-strand wire |
| CN111898307B (en) * | 2020-08-20 | 2022-08-02 | 哈尔滨工业大学 | Grading simplification method of fatigue simulation model of welding spot containing multi-strand wire |
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| CN102968516B (en) | 2015-10-28 |
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Address after: 211800 No. 10, prosperous road, Nanjing, Jiangsu Patentee after: Nanjing Zhongche town Haitai Brake Equipment Co Ltd Address before: 211800 No. 10, prosperous road, Nanjing, Jiangsu Patentee before: Nanjing Puzhen Haitai Brake Equipment Co., Ltd. |